From bc3ac9f31642fb4697b313c2eb575c5286f35c2a Mon Sep 17 00:00:00 2001 From: Sekhar Nori Date: Tue, 29 Jun 2010 11:35:12 +0530 Subject: davinci: edma: provide ability to detect insufficient CC info data This patch modifies the EDMA driver to expect the channel controller (CC) infomation passed on by the platform as a fixed size (EDMA_MAX_CC) array of pointers to structures. Doing so helps catch errors of the sort where the resource structure has information for more channel controllers than the number channel controller info structures defined. Such insufficient platform data would lead to illegal memory accesses. Signed-off-by: Sekhar Nori Signed-off-by: Kevin Hilman --- arch/arm/mach-davinci/include/mach/edma.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/mach-davinci/include') diff --git a/arch/arm/mach-davinci/include/mach/edma.h b/arch/arm/mach-davinci/include/mach/edma.h index ced3092af5ba..9a3bcc6f2602 100644 --- a/arch/arm/mach-davinci/include/mach/edma.h +++ b/arch/arm/mach-davinci/include/mach/edma.h @@ -230,6 +230,8 @@ enum sync_dimension { #define EDMA_CONT_PARAMS_FIXED_EXACT 1002 #define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003 +#define EDMA_MAX_CC 2 + /* alloc/free DMA channels and their dedicated parameter RAM slots */ int edma_alloc_channel(int channel, void (*callback)(unsigned channel, u16 ch_status, void *data), -- cgit v1.2.1